塑殼斷路器型號規格

塑殼斷路器（英文簡稱為MCCB）主要作用是為低(di)壓配電系(xi)統和(he)電動機保護回路中的過(guo)載、短路提(ti)供特(te)殊的保護功能。由于其可靠性和(he)穩定性，因此(ci)，成為工業上應用十分廣泛的產品(pin)。

塑殼斷(duan)(duan)路器(qi)不同(tong)的(de)型號有不同(tong)的(de)尺寸。斷(duan)(duan)路器(qi)一般由觸(chu)頭(tou)系(xi)統、滅(mie)弧系(xi)統、操(cao)作機構、脫(tuo)扣器(qi)、外(wai)殼等構成。

塑殼(ke)(ke)斷路器的(de)型(xing)號(hao)開(kai)頭(tou)3個字母為系(xi)列代號(hao)有NS,NSX,NSE,CVS,EZD。代號(hao)之后是開(kai)關殼(ke)(ke)架(jia)電流(liu)+開(kai)關分斷能(neng)力(li)代號(hao)，如NSX100N殼(ke)(ke)架(jia)電流(liu)100A。分斷能(neng)力(li)N為50KA。

開(kai)關(guan)極(ji)數和脫(tuo)扣器類型和開(kai)關(guan)額(e)定(ding)電流(liu)如:NSX100N3P3DTM25D NSX系列，殼(ke)架(jia)電流(liu)100A,3P3D為(wei)3極(ji),TMD為(wei)熱(re)磁脫(tuo)扣25為(wei)額(e)定(ding)電流(liu)25A。

塑殼式斷路器(qi)一般用于配(pei)電饋線控(kong)制和(he)保護，小型(xing)配(pei)電變壓器(qi)的低壓側出(chu)線總(zong)開(kai)關(guan)，動力配(pei)電終端控(kong)制，也可用于各種生產機械的電源開(kai)關(guan)。

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斷路器殼架等級

斷路(lu)器殼(ke)架(jia)等級額(e)定電(dian)流(liu)是指基本尺寸相同的(de)(de)框(kuang)架(jia)和塑料外(wai)殼(ke)中能(neng)裝的(de)(de)最大脫扣器的(de)(de)額(e)定電(dian)流(liu)。

斷路器(qi)額(e)(e)定電流(liu)是指(zhi)斷路器(qi)中(zhong)的脫扣器(qi)能(neng)長期通過(guo)的電流(liu)，又稱(cheng)斷路器(qi)脫扣器(qi)額(e)(e)定電流(liu)。

同一(yi)系(xi)(xi)列(lie)中(zhong)(zhong)(zhong)有多(duo)(duo)種殼(ke)架等(deng)(deng)級(ji)(ji)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流，同一(yi)殼(ke)架等(deng)(deng)級(ji)(ji)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流中(zhong)(zhong)(zhong)又有多(duo)(duo)種額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流。例如DZ20系(xi)(xi)列(lie)中(zhong)(zhong)(zhong)有100、225、400、630、800、1250等(deng)(deng)殼(ke)架等(deng)(deng)級(ji)(ji)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流，而100殼(ke)架等(deng)(deng)級(ji)(ji)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流中(zhong)(zhong)(zhong)有16A、20A、25A、32A、40A、50A、63A、80A、100A額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流;225A殼(ke)架等(deng)(deng)級(ji)(ji)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流中(zhong)(zhong)(zhong)有100A，125A、160A、180A、200A、225A額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流。DZ20—100和DZ20—225兩種殼(ke)架等(deng)(deng)級(ji)(ji)中(zhong)(zhong)(zhong)都(dou)有100A額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流，但斷(duan)路(lu)器(qi)體積外形和分斷(duan)能(neng)力(li)不相同，因(yin)此在選用時要把型號填(tian)寫完(wan)整即具體的(de)(de)(de)殼(ke)架等(deng)(deng)級(ji)(ji)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流內的(de)(de)(de)斷(duan)路(lu)器(qi)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流。額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流分級(ji)(ji)是(shi)(shi)按 (1.25)優先系(xi)(xi)數來選擇的(de)(de)(de)：一(yi)方(fang)面是(shi)(shi)符合和滿足最(zui)大線路(lu)和電(dian)(dian)(dian)器(qi)元(yuan)件額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流的(de)(de)(de)需(xu)要;另一(yi)方(fang)面是(shi)(shi)為了標準化，以取得(de)最(zui)佳的(de)(de)(de)使用導線及加工的(de)(de)(de)效益。因(yin)此它所規(gui)定(ding)(ding)的(de)(de)(de)級(ji)(ji)別是(shi)(shi)：3(6)、8、10、12.5、16，20、25、32、40、50、63、80，100、125、160、200、250、315、400A等(deng)(deng)。由(you)于此規(gui)定(ding)(ding)，當線路(lu)計算(suan)負載為90A時，則只(zhi)能(neng)選100A規(gui)格，因(yin)此在一(yi)定(ding)(ding)程(cheng)度上影響它的(de)(de)(de)保(bao)護性(xing)能(neng)。

脫扣(kou)器電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)整定值(zhi)是(shi)(shi)(shi)指(zhi)脫扣(kou)器調整到動作電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)值(zhi)。它(ta)是(shi)(shi)(shi)指(zhi)額定電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)In的倍(bei)數，是(shi)(shi)(shi)動作電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)值(zhi)，例(li)如：過(guo)(guo)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)整定到電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的1.2、1.3、5、10倍(bei)，就寫成Ir=1.2In，1.3In、5In、10In等(deng)。現在一些(xie)電(dian)(dian)(dian)(dian)(dian)子(zi)脫扣(kou)器，它(ta)的過(guo)(guo)載長(chang)延(yan)時額定電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)是(shi)(shi)(shi)可(ke)調的，所調整的電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，其實(shi)仍(reng)是(shi)(shi)(shi)額定電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，是(shi)(shi)(shi)可(ke)長(chang)期通過(guo)(guo)的最大電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)。

額定工作電流是斷路器(qi)在裝輔(fu)助觸頭(附件(jian))時觸點在一定工作電壓下的實際工作電流，電流為3A或6A，用于控(kong)制和保護回路。

塑殼斷路器選型

1、阻抗百分比-與變壓器短路電壓百分比相等

阻抗電壓百分比又稱短路電壓百分比，表明變壓器內阻抗的大小。變(bian)壓(ya)(ya)(ya)器的短路阻(zu)(zu)抗百(bai)分(fen)(fen)比(bi)(bi),在(zai)數值上與變(bian)壓(ya)(ya)(ya)器短路電(dian)壓(ya)(ya)(ya)百(bai)分(fen)(fen)比(bi)(bi)相等。它(ta)是(shi)指(zhi)將變(bian)壓(ya)(ya)(ya)器二次繞(rao)阻(zu)(zu)短路，在(zai)一次繞(rao)阻(zu)(zu)施加(jia)電(dian)壓(ya)(ya)(ya)，當二次繞(rao)阻(zu)(zu)通過額定(ding)電(dian)流時，一次繞(rao)阻(zu)(zu)施加(jia)的電(dian)壓(ya)(ya)(ya)與額定(ding)電(dian)壓(ya)(ya)(ya)之比(bi)(bi)的百(bai)分(fen)(fen)數。

變壓(ya)(ya)器(qi)的(de)短路(lu)阻抗(kang)值百分比(bi)是變壓(ya)(ya)器(qi)的(de)一個重要(yao)參數,它(ta)表(biao)明變壓(ya)(ya)器(qi)內阻抗(kang)的(de)大(da)(da)小，即變壓(ya)(ya)器(qi)在額定負荷運(yun)行(xing)(xing)時變壓(ya)(ya)器(qi)本(ben)身的(de)阻抗(kang)壓(ya)(ya)降大(da)(da)小。它(ta)對于(yu)變壓(ya)(ya)器(qi)在二(er)次側發生(sheng)突然短路(lu)時，會(hui)產生(sheng)多(duo)大(da)(da)的(de)短路(lu)電流有決定性的(de)意義，對變壓(ya)(ya)器(qi)制造價(jia)格(ge)大(da)(da)小和變壓(ya)(ya)器(qi)并列運(yun)行(xing)(xing)也有重要(yao)意義。

由(you)于(yu)(yu)這些(xie)特點，于(yu)(yu)是短路阻(zu)抗值習慣使(shi)用(yong)(yong)百(bai)分比數值。如果在某些(xie)場合需(xu)要(yao)使(shi)用(yong)(yong)實際數值計算，當然(ran)要(yao)換算。

2、額定電壓選擇

即塑(su)料(liao)外殼式斷路器(qi)的(de)電(dian)(dian)壓(ya)等級是多少，常(chang)見的(de)抵押配電(dian)(dian)系(xi)(xi)統(tong)為(wei)400v，如小區住(zhu)宅區，配電(dian)(dian)房的(de)配電(dian)(dian)電(dian)(dian)壓(ya)配比(bi)為(wei)10/0.4，一(yi)般采用TN-C-S或TN-S系(xi)(xi)統(tong)，變(bian)壓(ya)器的(de)中性點直接接地，當然也不排(pai)除690v，如風電(dian)(dian)場新能源(yuan)發電(dian)(dian)，所以選擇斷路(lu)器額定(ding)電(dian)(dian)壓(ya)與系(xi)(xi)統(tong)電(dian)(dian)壓(ya)相適應，塑殼斷路(lu)器的(de)極(ji)限分段能力與額定(ding)電(dian)(dian)壓(ya)息息相關。

3、額定極限分斷電流ICU

根據GB14048.2低壓斷路器標準，是指斷路器一次(ci)短路后(hou)不要求再承受起額定電流的分斷能力，后(hou)者一般為前者的百分之25，50，75，100。

塑殼(ke)(ke)斷(duan)路(lu)(lu)器的(de)額定(ding)極限分(fen)斷(duan)電(dian)(dian)(dian)流(liu)ICU和額定(ding)運行短(duan)路(lu)(lu)電(dian)(dian)(dian)流(liu)ics與額定(ding)電(dian)(dian)(dian)壓(ya)有關系(xi)，同(tong)一型(xing)號(hao)的(de)塑殼(ke)(ke)斷(duan)路(lu)(lu)器在不同(tong)額定(ding)電(dian)(dian)(dian)壓(ya)下(xia)，其分(fen)斷(duan)能力不一樣，電(dian)(dian)(dian)壓(ya)能級越高(gao)滅弧越困難，斷(duan)路(lu)(lu)器能分(fen)斷(duan)的(de)短(duan)路(lu)(lu)電(dian)(dian)(dian)流(liu)越低。如下(xia)圖塑殼(ke)(ke)斷(duan)路(lu)(lu)器NSX100F，在85/415v電(dian)(dian)(dian)壓(ya)下(xia)，分(fen)斷(duan)能力為(wei)36kA,660/690v額定(ding)電(dian)(dian)(dian)壓(ya)下(xia)為(wei)8KA。

4、短路器的額定電流

斷路器的額定電流等于額定不間斷電流Iu且等于約定自由空(kong)氣發熱電流Ith，也就是斷(duan)路(lu)器能連續承載且不超高溫升(sheng)的電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，斷(duan)路(lu)器的殼架電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)指斷(duan)路(lu)器能裝的最大的過電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)脫扣(kou)器的額定電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，如(ru)NSX100斷(duan)路(lu)器有(you)兩種反(fan)時限過電(dian)(dian)(dian)(dian)(dian)脫扣(kou)器的額定電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)等級40A和(he)100A，100A是NSX100F的殼架電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，反(fan)時限過電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)脫扣(kou)器整定電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)是根據線路(lu)計算電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)和(he)導體長期運(yun)行電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)在脫扣(kou)器上整定的電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)值。